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Add documentation about what TABPAGENR and TABCLOSENR do

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Wayne Rowcliffe
2015-09-17 19:30:48 -05:00
parent 7c32d86f7d
commit d12f328b60
1 changed files with 24 additions and 0 deletions
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24
src/nvim/buffer.c
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@@ -3118,6 +3118,30 @@ build_stl_str_hl(
curitem++; curitem++;
continue; continue;
} }
// TABPAGE pairs are used to denote a region that when clicked will
// either switch to or close a tab.
//
// Ex: tabline=%0Ttab\ zero%X
// This tabline has a TABPAGENR item with minwid `0`,
// which is then closed with a TABCLOSENR item.
// Clicking on this region with mouse enabled will switch to tab 0.
// Setting the minwid to a different value will switch
// to that tab, if it exists
//
// Ex: tabline=%1Xtab\ one%X
// This tabline has a TABCLOSENR item with minwid `1`,
// which is then closed with a TABCLOSENR item.
// Clicking on this region with mouse enabled will close tab 0.
// This is determined by the following formula:
// tab to close = (1 - minwid)
// This is because for TABPAGENR we use `minwid` = `tab number`.
// For TABCLOSENR we store the tab number as a negative value.
// Because 0 is a valid TABPAGENR value, we have to
// start our numbering at `-1`.
// So, `-1` corresponds to us wanting to close tab `0`
//
// Note: These options are only valid when creating a tabline.
if (*fmt_p == STL_TABPAGENR || *fmt_p == STL_TABCLOSENR) { if (*fmt_p == STL_TABPAGENR || *fmt_p == STL_TABCLOSENR) {
if (*fmt_p == STL_TABCLOSENR) { if (*fmt_p == STL_TABCLOSENR) {
if (minwid == 0) { if (minwid == 0) {